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What is Mac Address....

A MAC address, or Media Access Control address, is a address associated with a network adapter. While IP addresses are associated with software, MAC addresses are linked to the hardware of network adapters. For this reason, the MAC address is sometimes called the physical address or the hardware address. MAC addresses are expressed in hexadecimal notation in the following format: 01-23-45-67-89-AB. (:) are sometimes used instead of dashes (-).
MAC addresses are often considered permanent as they are hardware address which is assigned by manufacturer itself, but in some circumstances, they can be changed.

There are two types of MAC addresses:

1.Locally Administered Address
The LAA(Locally Administered Address) is an address that changes an adapter's MAC address. The LAA is a type of administered MAC address, and it is possible to change the LAA of a network adapter to any address of allowed length. When the LAA is set, the network adapter uses the LAA as its MAC address. Otherwise, network adapter uses the UAA(Universally Administered Address) as its MAC address. All devices on the same subnet must have different MAC addresses, however. MAC addresses are very useful in diagnosing network issues, such as duplicate IP addresses, so it is a good practice to allow devices to use their UAAs instead of assigning LAAs.
2.Universally Administered Address
The UAA(Universally Administered Address) is the most commonly used type of MAC address. This address is assigned by the manufacturer to the network adapter. The first three octets define the manufacturer, while the second three octets vary and identify the individual adapter. All network adapter manufacturers have their own code, called the Organizationally Unique Identifier (OUI). For example, in the MAC address 00-14-22-00-40-96, the first three octets 00-14-22 for Dell 00-40-96 for Cisco.
MAC addresses are useful for security purposes, as they are only rarely changed from the default. IP addresses can change dynamically, especially on networks using DHCP to assign IP addresses, so MAC addresses are often a more reliable way to identify senders and receivers of network traffic. On wireless networks, MAC address filtering is a common security measure to prevent unwanted network access.
  • how to check MAC address
        Go to run type cmd and enter " getmac "
         You will find you MAC address .....

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